By increasing overall levels of anti–SARS-CoV-2 neutralizing antibodies, receiving a COVID-19 vaccination booster dose (using a vaccine that was developed to protect against the original viral strain) can help inhibit Omicron infection and reduce the risk for severe disease; this is especially impactful in older persons and the immunocompromised populations. The same is true when a previously infected individual gets vaccinated. However, when an individual has had a prior infection before the emergence of Omicron and has also received a full vaccination course that includes one or more booster doses, there is even more significant protection against severe disease.
When an individual is infected by the Omicron variant, it is possible to reduce the risk for Omicron transmission to other household contacts using a multicomponent COVID-19 prevention strategy including up-to-date vaccination, isolation of the infected person, and wearing masks at home. However, although these strategies reduce transmission risk, they do not eliminate it.
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Cite this: Michael Stuart Bronze. Fast Five Quiz: COVID-19 Omicron Variant - Medscape - Sep 20, 2022.